Locomotive-boiler



(N9 Model.)

- W. B. MACK v LOGOMOTIVE BOILER.

No. 506,054. Patented Oct. 3-,- 1.893.

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' UNrTED STATES PAT NT QFFICE.

WILLIAM B. MACK, OF BOSTON, MASSACHUSETTS.

LOCOMOTIVE-BOILER.

SPECIFICATION forming part of Letters Patent No. 506,054, dated October3, 1893.

Application filed February 1, 1893. Serial No. 460,603. (No model.)

To aZZ whom it may concern:

Be it known that 1, WILLIAM B. MACK, of East Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Locomotive- Boilers, of which the following is aspecification.

This invention relates to that class of locomotive boilers in whichprovision is made for the rapid circulation of water from the lowerforward portion of the boiler to the lower portion of the water-leg, forthe purpose of insuring the passage of the maximum quantity of waterthrough the water-leg, and therefore the maximum rapidity of heating andsteam generating.

In Letters Patent No. 487,535, granted to me December 6, 1892, I haveshown means for providing for the passage of water from the forwardportion of the boiler directly to the lower portion of the front side ofthe water-leg, said means comprising a conduit adapted to conduct waterbetween the two points specified, portions of said conduit being appliedto the exterior-of the boiler and water-leg, so that the constructioninvolves not only the formation of orifices in the external shell of theboiler and in the exterior wall of the water-leg, but also externalconnecting devices or parts. 7

My present invention has for its object to simplify and reduce the costof the means employed for producing the desired result, and to enablesaid result to be produced without the employment of any externaladditional parts, and without the formation of orifices in the shell ofthe boiler or in the external wall of the water-leg.

To these ends, the invention consists in the combination with alocomotive boiler and its water-leg of a sectional conduit formed to extend along the bottom of the boiler from the forward end thereof to thefront wall of the water-leg, and pipes detachably secured to the rearend of said conduit and extending downwardly to a point near the bottomof the front portion of the water-leg, two of said pipes being arrangedso that their lower ends will be in position to .deliver the water thatpasses through them into the side portion of the water-leg, whileanother pipe (there may be one or more) delivers water at the lowerportion of the front wall of the water-leg, at or near the centerthereof, said conduit and pipes being located wholly within the boilerand water leg and adapted to be applied to the boiler without making anystructural change inthe boiler or water-leg, all of which I will nowproceed to describe.

Of the accompanying drawings, forming part of this specification, Figure1 represents a longitudinal section-0f a portion of a locomotive boilerprovided with my improvement. Fig. 2 represents a section on line 22,Fig. 1, looking toward the right. Fig. 3 represents a perspective viewof the conduit and pipes.

The same letters of reference indicate the same parts in all thefigures.

In the drawings: a represents alocomotive boiler, having the usualwater-leg b, communicating with the rear portion of the boiler as usual.

In carrying out my invention, I place at the bottom of the boiler aconduit 0 composed of two or more sections detachably connected by meansof bolts a passing through ears 0 on the sections. Said conduit extendsfrom the front lower portion of the boiler backwardly to the front wallof the water-leg, and is open at its front end and closed at its'rearend, so that they extend down nearly to the bottom of the water-leg,each pipe being open at both ends, and constituting a conduit adapted toconduct water from the forward lower portion of the boiler to the top ofthe front portion of the water-leg.

To the rear portion of the sectional conduit c are detachably securedpipes d d d which extend downwardly to points near the bottom of thefront part of the water-leg and consti tute outlets from the conduit,the pipes d 61' being extended outwardly in opposite directions from theconduit as shown in Figs. 2 and 3, so that the streams of waterdelivered by said pipes into the water-leg will pass directly into theside portions of the water-leg, thus insuring a suitable supply of waterfor said side portions, and preventing the liability of steam beingformed therein, to the detriment of the inner walls of the water-leg.The intermediate pipe (1 is carried downwardly to the lower portion ofthe water-leg, and delivers water at or near the center of the frontwall of the water-leg. There may be more than one of the intermediatepipes 01 if desired.

It will be seen that the sectional conduit 0 and the pipes 61 d d may beapplied to the boiler and water leg of a locomotive of ordinaryconstruction, without making any change in the construction of theboiler and water-leg, so that my improvement enables old boilers to bereadily fitted with means for increasing the rapidity of the circulationof water, the sectional construction of the conduit enabling it to bereadily inserted in an old boiler by assembling and connecting thesections within the boiler, While the detachable connection of the pipesto the conduit enables the pipes to be set in place after the conduithas been applied. The pipes may be detachably secured to the conduit bymeans of screws or bolts passing through flanges f formed on the pipesor by any other suitable means.

I claim r l. The combination with a locomotive boiler and its water-leg,of a conduit extending 1ongitudinally of the boiler along the bottom ofthe same from the forward portion to the front portion of the water-leg,and pipes connected with the rear of said conduit and extended to thelower portion of the water-leg,

tachably secured to one end of said conduit and extending at an angletherewith, as set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 20th day of January, A. D.1893.

WILLIAM B. MACK. Witnesses:

C. F. BROWN, A. D. HARRISON.

